<template>
  <div class="box-a"></div>
</template>

<script>
export default {

}
</script>

<style scoped>
.box-a{
    width: 100px;
    height: 100px;
    background: orange;
    position: relative;
    animation: myframe 5s infinite;
}
@keyframes myframe {
    from{
        top:0px;
    }
    to{
        top:200px;
    }
}
</style>